Battery Help needed please

[Brownie]

What are your thoughts on this Mooper,
Will it work? Its say for 4 cell 14.8v betteries.

http://www.ebay.co.uk/itm/7-4V-14-8...m-Indicator-/231517690086?hash=item35e78798e6

 

[Mooper]

Theoretically it could, but it would scare the flax out of you when it goes off randomly while you're playing. It'd be easier to build a low battery circuit with an LED

Daftmike's 2 circuits:
viewtopic.php?f=7&t=255
Both use both a red and green LED.

Mario's version:
viewtopic.php?f=7&t=3640
Just a red LED.

 

[Brownie]

Is this the right charger i need?

http://www.everymarket.com/uk/toys-game ... 61110.html